@-moz-document url-prefix()
{
.ui-select .ui-btn select{opacity:.0001}
}
@document url("http://www.w3.org/Style/CSS/") {
  #summary { background: yellow; color: black}
}
@document url-prefix("http://www.w3.org/Style/CSS/") {
  #summary { background: yellow; color: black}
}
@document domain("w3.org") {
  body { font-size: 16px ! important }
}
@document regexp("http://www.w3.org/TR/\\d{4}/[^/]*-CSS2-\\d{8}/") {
  body { font-size: 20px ! important }
}